Subject:
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Re: bug in setting lnp host address?
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Wed, 5 Jun 2002 01:04:07 GMT
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Viewed:
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2021 times
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you'll probably hate me for being a nitpicker....
> I will parameterize this shift-value based on the CONF_LNP_HOSTMASK
> definition. Unless others object strenuously, I prefer to leave this
> interface using small valued numbers.
technically, you should not do any bitshifting at all. There is always the
odd case when someone decides to be clever and have a hostmask with
interleaved zeros. for example, a hostmask of 10101010 (0xAA), while
confusing, is still a valid hostmask. If that host is listening on port
01010101, and someone sends a message addressed to 11111111, then that host
should pick it up and direct the message to the right port. In this case,
bitshifting will never work.
This is also why I would like to see the addressing scheme finalized. I
think it would make more sense to have a series of address-only bits
followed by a series of port-only bits. Unless anybody wants to
significantly change LNP, I think it would make sense to settle on 4 bits
for the host and 4 for the port, as this is what most people are using right
now and is most likely adequate for the future, unless someone plans on
throwing a big legOS LNP festival...
cheers,
albert
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Message has 1 Reply:
 | | Re: bug in setting lnp host address?
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| And, you'll probably hate my reply... "Just because you can do something, doesn't mean you should." The very idea of a discontinuous array of bits representing a network address in something as rudimentary as LNP makes my hair stand on end. The idea (...) (22 years ago, 5-Jun-02, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: bug in setting lnp host address?
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| You are correct in stating that I shouldn't have restricted you to 16 nodes X 16 ports. I did however, want to normalize the host address in the visible API and user interfaces to be a small 0..N number instead of a random hex byte value, properly (...) (22 years ago, 4-Jun-02, to lugnet.robotics.rcx.legos)
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